## Temperature and K

$\ln K = -\frac{\Delta H^{\circ}}{RT} + \frac{\Delta S^{\circ}}{R}$

ng1D
Posts: 43
Joined: Wed Sep 18, 2019 12:17 am

### Temperature and K

How is K temperature dependent using the Van't Hoff Equations?

John Liang 2I
Posts: 102
Joined: Fri Aug 30, 2019 12:18 am

### Re: Temperature and K

ng1D wrote:How is K temperature dependent using the Van't Hoff Equations?

K will change based on the Van't Hoff Equation because as we see in ln(k)=-H/RT+S/R, the K value is related to the T value. In the past, I don't think we had any equation that would explicitly relate the two variables. we can deduce that a large T value would greatly decrease the -H/RT component, and would give a large ln(k)=(Big x value). K would then be raised as well since 10^(big x value) would equal K. hope this helps!

MaggieHan1L
Posts: 100
Joined: Thu Jul 11, 2019 12:17 am

### Re: Temperature and K

I think it’s harder to relate K to temperature since the equation compares the two Ks as a ratio of ln(K2/k1)